Facebook said on Thursday that it would remove around 800 pages and accounts run by Americans, many of which amplified false and misleading content in a coordinated fashion. And Twitter took down 50 accounts this month thought to be run by Americans posing as Republican lawmakers.

Separately, advocacy groups in Georgia have filed a lawsuit after reports that Brian Kemp, the secretary of state and the Republican nominee for governor, stalled more than 53,000 voter registrations, including a disproportionately high number of black voters.

What next for the markets?

The performance of Asian markets suggested that investor fears may be calming today, after a spate of bad news on Wall Street and beyond this week. Futures markets that track U.S. stocks are rising this morning, while those tracking Europe are mixed.

President Trump responded to the news by lashing out at the Federal Reserve, calling it “crazy,” “loco,” “going wild” and “out of control” for slowly raising interest rates. The intensity and frequency of Mr. Trump’s attacks on the Fed have some experts worrying about its independence.

Ripple effects of Saudi journalist’s disappearance

Both President Recep Tayyip Erdogan of Turkey and Crown Prince Mohammed bin Salman of Saudi Arabia have a lot to lose in the dispute. On Thursday, they agreed to form a joint “working group” to examine Mr. Khashoggi’s case, suggesting that they were looking for ways to de-escalate the situation.

• “The Argument”: new from our Opinion section. Three columnists from across the political spectrum — Ross Douthat, Michelle Goldberg and David Leonhardt — make sense of the news, without pretending that they agree about it. This week: the future of the Supreme Court and the future of #MeToo.

Times editors consult an in-house style guide for grammar and spelling questions like this. And the entry for “whereabouts” tells us to “construe it as a singular.”

But why?

While “whereabouts” is commonly used as a noun, it began as an adverb (“Whereabouts are you from?”). That means the “s” at the end is an adverbial suffix — think of “always” or “besides” — and not an indicator of a plural noun.

Historically, “whereabouts” has been considered both singular and plural when used as a noun, though in recent years the plural has been winning out.

Philip Corbett, our top editor for standards, said that in cases of two acceptable usages, the Times stylebook often specifies one, and sometimes the more traditional one.

“At some point,” he said, “we may have to consider whether to change our stylebook guidance, if only to avoid distracting readers who may believe that the singular usage is wrong.”